BREAKING CHAMBERS

GENERAL

The breaking chambers are constructions in which buried cables lead from the outside network of fortification. They house dispatchers and connection boxes provided for the troops occupying the intervals.
In the North East two kinds of design are needed very much.

The first type involves breaking chambers where lead several cable arteries. These rooms are usually located on the ring road itself and essentially buried distributor for the network.
A trap if the room is a door or buried if it is built on a hillside gives access to a hallway. This corridor contains the junction boxes provided for field troops leads to a room of about two meters by two meters closed by a locked door.
This open room where the network cables contain dispatchers casings and protections junction boxes located in the hallway and on which external forces will connect lines from their campaign mobilization. These troops for this purpose use a duplicate key closing the access door to the corridor, the key of the door being held by the operators responsible for the maintenance engineers and network repairs.

In Alsace a model of a different connection box is integrated directly into the frame of the door or access door. This box accessed from the outside allows troops to connect their lines without having to enter the chamber itself.

The second type is applied to him to the breaking chambers constituting an artery termination. These rooms are a model are generally located near the locations at which it is expected that the interval troops or artillery will complement position to the mobilization. This is actually a simple concrete sinks closed by a door allowing access. There is a distribution unit and one or more terminal boxes as well as the necessary protection.

In the South East, many variations exist often imposed by the terrain and the nature of the terrain or work late before or during the war. Generally rooms are built in the rock or on steep inclines. Access to it is mostly walk-through a door with direct access to local or settled dispatchers and protections. Junction boxes for field lines are placed in a recess of the outer wall closed by a metal component. The key to this component is given to the troops to connect to, the local distributor of remaining in possession of the only specialists in charge of the network.

When breaking chambers are built in roadside or in a crowded place a small corridor also closed by a locked gate or junction boxes are installed is added before the local dispatchers.

In Briançonnais, breaking chambers are of a particular model does not meet regulatory requirements. The part of the underground network has concreted cut thin wells sealed with cast iron plates similar to those used in the road for manholes of sewage collectors. This variation is explained by the fact that burial of networks in this sector has been initiated very late.

TYPES

A1 TYPE

large breaking chamber with telephone exchange - Enhanced Protection - Well Access
Well access (hatch and ladder)
Enhanced protection (1m slab, walls 1,25m)
Local inside 3m x 2m 50
This should not be confused with the rooms in which was installed a central although not originally planned. It should if in doubt refer to the specific size of the local interior to standard plan.

Enhanced protection (1m slab, walls 1,25m)
Local inside 3m x 2m 50
NB: This type should not be confused with the rooms in which was installed a central although not originally planned. It should if in doubt refer to the specific size of the local interior to standard plan.

Smaller breaking chamber - Medium protection
Well access (Trappe and scale)
Medium protection (50cm slab, 60cm walls)
Local inside 80cm X1m
NB: This type is essentially different type E by the size of the local

EQUIPMENT

The equipment of breaking chambers essentially comprises dispatchers casings and guards and connection boxes for lines campaigns to connect to it.
In some chambers, where the number of pairs of a cable serving an organ was less than the required number of control circuits, one or more translators boxes were installed to increase the number of channels available.

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